Pumping Above Our Weight Class

NMP 03 Micro Gas Pump
The newly introduced ultra-small, portable device pump — weighing only 11g and measuring just 12.9 mm x 24.2 mm — delivers very consistent, linear transfer up to 500 mL/min.

In addition to ultra-small size and wide flow rate range, the NMP 03 offers a long service life, outstanding efficiency, leak tightness, and quiet, low-vibration operation. Typical portable device applications, for which the NMP 03 micro gas pump is very well suited, include: emissions measurement and gas analyzers; patient monitoring; capnography; negative pressure wound therapy; ion-mobility spectrometry (trace detection); drugs and explosives detection; handheld pipette/dosing; and print-head meniscus control.

The NMP 03 offers a wide operating temperature range of -20 °C – +60 °C (environment and gas) thereby making it well-suited for outdoor use and applications involving hot or cold gases. Plus, like other KNF micro gas pumps, the new NMP 03 features a modular system which can be configured to match your specific requirements.

Visit www.knfusa.com/NMP03 to learn more.

KNF Associates Discuss MedTech Pump Design Trends with MDDI

Pumps for Medical TechnologyThe following excerpt is from the MDDI article, “Pump Designs Flow Toward Smaller Sizes“.


As medical devices require smaller pumps that fulfill rigorous design requirements, the relationship between OEMs and suppliers is shifting.

A medical device that manages the movement of a gas or a fluid relies on a pump to carry out the application. Advances in technology enable pump suppliers to provide pumps capable of addressing increasingly complex medical device requirements. But industry pressures are also changing the nature of the relationship between OEMs and their suppliers.

At one time, medical device companies looked at suppliers simply as a way to outsource work and reduce costs, said Dave Vanderbeck, business development manager for Trenton, NJ-based KNF Neuberger. While suppliers can help OEMs reduce their costs, Vanderbeck increasingly now sees OEMs turning to their pump suppliers for design expertise.

Read the full article at MDDIonline.com >>

Trade Show Demo Features KNF Micro Vacuum Pump

Throughout the year, we’ve noticed a demonstration unit that caught our attention on the show floors of BIOMEDevice San Jose, SLAS and MD&M West. This demo – created and displayed by AllMotion – highlights the ability of their four-axis controller board, and utilizes a KNF Micro Gas Pump to create vacuum for stacking and unstacking marbles at a dizzying speed. AllMotion is a California-based manufacturer of stepper drives, stepper controllers, servo drives and servo controllers.

The demo illustrates the ability of the AllMotion board to run motors through four axis of movement and calculate the associated trajectories, while simultaneously running the KNF Micro Gas Pump, a vacuum switch, limit switches, and LEDs – all in a perfectly-timed ballet of motion.

Continue reading

KNF OEM Diaphragm Pumps Used in Multiple Environmental Studies

A customer recently brought five environmental studies, ranging from 2013 to 1996, to our attention. Each of the studies details research conducted with one common component: a KNF OEM pump, which proved integral for sample collection or transfer during the analyses. Of the five studies, we cherry-picked two air-toxics studies for your further reading. However, here’s the listing of all five:

  1. Walter 2013 High Res Measurements Atmospheric Hydrogen West African Coast Mauritania
  2. Querino 2011 Methane Flux Vertical Gradient Mixing Ratio Measurements in a Tropical Forest
  3. Bailey 2010 Southwest Indianapolis Air Toxics Study
  4. Romashkin 2001 In Situ Measurements Long Lived Trace Gases Lower Stratosphere Gas Chromatography
  5. Elkins 1996 Airborne Gas Chromatography In Situ Measurements Long Lived Species Upper Troposphere Lower Stratosphere

KNF Environmental Pumps for Gas Sampling and AnalysisWe’re very proud KNF pumps are relied upon within ambient, source and portable devices for environmental sample collection and analysis. For example, the 2010 study listed above details a project in which the Indiana Department of Environmental Management (IDEM), the U.S. EPA, the City of Indianapolis, and a diverse group of stakeholders teamed up to conduct an air toxics study in southwestern Indianapolis, Indiana (this region was identified by the U.S. EPA National Air Toxics Assessment [NATA] in 1996 and 1999 to be an area of potential concern for cancer risk from air toxics).

A KNF pump was used to enable the analysis of the total non-methane organic carbon (TNMOC) concentration of ambient air. For a history lesson, the Clean Air Act Amendments of 1990 required the EPA’s Office of Air Quality Planning and Standards to set National Ambient Air Quality Standard for the “criteria” pollutant, ozone. In areas of the country where the NAAQS for ozone is being exceeded, additional measurements of the ambient nonmethane organic compound (NMOC) concentration are needed to assist the affected States in developing revised ozone control strategies. Measurements of ambient NMOC are important to the control of volatile organic compounds (VOCs) that are precursors to atmospheric ozone.

Therefore, a reliable pump was essential for the collection of air samples with potentially harmful toxics. Simultaneously, it was critical for the pump to collect samples in a manner that didn’t change or contaminate the samples. KNF pumps, known for their reliability and chemical inertness, are ideally situated for this type of application. Additionally, their extremely high gas tightness allows for the accurate and complete collection of media, without the risk of sample loss, dilution, or contamination.

Also, in 2001, a study, titled In Situ Measurements of Long-Lived Trace Gases in the Lower Stratosphere by Gas Chromatography, utilized the KNF NMP 830 pump (referenced as UNMP 830 pump in article) . For this study, a four-channel gas chromatograph measured different air qualities in 70 and 140 second intervals. Air external to the aircraft was delivered to the instrument from an external, variable speed, two-stage, KNF diaphragm pump, driven by a brushless 24-V DC motor. The KNF pump was mounted on the aft wall, and was turned on by the ACATS-IV onboard computer when the ER-2 aircraft ascended through 87 kPa of atmospheric pressure.

Regarding this second study, there are a few points of interest we’d like our readers to note. First, the usage of the pump is a prime example of KNF application flexibility. The KNF NMP 830 micro pump is small; however, its footprint isn’t the only reason it was relied upon within this challenging design. For example, the pump in this application is pulling atmospheric samples at an extremely high altitude, measuring parts per billion (ppb) and parts per trillion (ppt). Expectedly, pump inertness is therefore paramount. Much like in the first study referenced above, environmental analysis customers have come to rely on KNF pump material options, including PTFE and stainless steel, and on the leak tightness of KNF pumps.

Additionally, the KNF pump used in this second study is driven by a brushless DC (BLDC) motor, which helps meet the small size mandate. BLDC allows flow rates to be adjusted as needed, helping to extend the lifecycle and reliability of a device. Motor adjustment is also particularly important for this application, because at high elevations, fewer air molecules are available to blow across the pump for cooling. Therefore, the pump faces the risk of overheating. However, the ability to adjust and operate the motor at a lower voltage and speed helps to mitigate this concern. The small and lightweight design of KNF micro gas pumps even allows for energy-efficient battery operation.

Also of note, there’s far less ambient pressure at the elevation at which the pump in this study is operating, resulting in less pressure on both the top and undersides of the diaphragm. This condition is certainly not ideal for pump operation, which further adds to the difficulty of this application. This, and the other challenges presented by high altitude operation and ppb/ppt detection require a specification-driven, individually-tailored pump. KNF excels in designing and configuring pumps to exacting requirements such as these. In fact, over 80 percent of KNF’s business involves custom-engineered pump solutions.

To round out this review, the first and second studies listed above used KNF pumps to flush sample flasks prior to sampling, and to collect and fill flasks, respectively. The last study used a KNF pump to collect samples in a high altitude study with a set-up similar to the Romashkin 2001 study, which was discussed above.

Summing up this entry to The Pump Post, each of the five studies offers a constant theme of KNF OEM pumps being well-suited for environmental sample collection and analysis applications. Please check back to learn more about KNF products in real-world applications!

KNF Demo to Debut at SLAS 2015

In just a few short days, some of us here at KNF will be leaving for our nation’s capital to attend the 4th annual SLAS Conference and Exhibition, being held from February 8th-10th. We are particularly excited about this year’s SLAS event as we will be unveiling a brand new demonstration at the KNF Neuberger booth (# 1511).

The new KNF demonstration effectively showcases a number of real-world pump applications, including: direct liquid transfer, vacuum aspiration, and pneumatics via 3 unique KNF pumps. When initiated, the demo cycles continuously through three separate stages. Light-up placards provide clarity for the viewer by explicitly stating which of the following processes is being performed in the demo:

KNF Pump Applications Demo

The KNF demo cycles through Vacuum Aspiration, Onboard Pneumatics, & Direct Liquid Transfer.

1) Vacuum Aspiration– The first process (pictured right) shows fluid being aspirated by the suction created from a powerful vacuum pump. You may notice the system’s ability to generate vacuum-over-liquid easily and quickly – this is due to the selection of a pump with a high gas flow rate, and the ability to handle moist gas with slugs of liquid.

2) Onboard Pneumatics– The next stage demonstrates high pneumatic performance in a compact, quiet and energy-efficient manner. The system employs a micro gas pump to pressurize a pneumatic cylinder which, in turn, raises a tube – a similar function to needle aspiration which is performed for various medical applications.

3) Direct Liquid Transfer– The 3rd process demonstrates direct liquid transfer, using a diaphragm liquid pump. Here, direct transfer of liquid media is made possible using a specially-designed, two-headed pump with high self-priming ability, and smooth flow – ideal for demanding, real-world applications, such as direct handling of liquid waste.

While each stage of the demo illustrates a unique application, it’s important to note the commonalities amongst the stages: First, each pump/stage includes chemically-resistant materials, which allow for the transfer of aggressive media. Each pump also utilizes a brushless DC (BLDC) motor. The BLDC motor (available for most KNF pumps) enables more precise speed control, lowers audible noise and vibration, and promotes a longer lifetime of operation. Also, a new KNF Digital Control provides enhanced programmable features over previous analog controllers while promoting consistent performance and reliability. Tested to over 1.6 million on/off cycles and 100,000+ hours in pump life tests, the KNF Digital Controller offers superior performance in demanding applications.


If you’re going to be at SLAS next week please stop by the KNF Neuberger booth (#1511) to check out our new demo, and to learn more about KNF’s range of gas and liquid OEM pumps.

KNF Team Members Demonstrate Pump Power at Open House

Recently, KNF hosted an Open House for employees and families at the US pump manufacturing facility in Trenton, NJ. At the event, KNF associates showcased a number of demonstrations featuring everything from customized OEM pumps used in high-tech medical equipment, to explosion-proof Industrial Process pumps, and even the latest RC 900 Rotary Evaporator system for laboratory applications. Guests of the event were fascinated as they slowly moved through the tour, learning about the diverse applications of which KNF pumps are a critical part.

Joe Alcamo, KNF USA Technical Director, commented on the team demonstrations: “It’s great that we are able to show our family and friends the power and versatility of the products that we produce, and to showcase some of the unique functions performed by our pumps with important applications.”

KNF Micro Diaphragm Gas Pump fits in palm of handKNF Micro Diaphragm Gas Pump demonstration with bowling ball One of the demonstrations that caught the attention of guests was presented by the KNF Engineering team and involved the lifting of a 17 lb. bowling ball by a micro gas pump no larger than a quarter! Typically, the small size of these pumps make them ideal for use in portable, hand-held, gas monitoring devices.

In the demo, a KNF NMP 05 micro-diaphragm gas pump was connected to the base of a suction cup, which rested on top of a bowling ball (pictured right).

When turned on, the tiny gas pump created a vacuum in just under 5 seconds, that was strong enough to enable the suction cup to lift the 17 lb. bowling ball.

The KNF facility tour and pump demonstrations were capped off with a picnic lunch, where employees and guests sat together to enjoy a family style barbeque in the warmth of the late summer sun.

Visit knfoem.com/micro-air to learn more about KNF micro gas pumps.
To learn more about KNF Neuberger Inc. click here.